数字化副载频解调的研究

副载频解调器是频分制遥测系统中的重要组成部分。由于工程实施中的实时性以及较低的系统复杂度难以达到要求,即过高的数据传输量造成滤波器阶数的提高,导致处理过程产生延时且消耗大量硬件资源。提出了针对实际工程中数字化副载频解调器性能优化的实施方案。在实际解调过程中,首先利用半带滤波器对原始数据进行抽取滤波,可以减少数据的处理量,降低数据输入频率,达到计算效率高以及实时性强的效果。最后用MATLAB对该解调方案进行了仿真,以此证明方案的正确性和有效性。

Study on Digital FM Demodulator in Telemetering System

The FM/FM demodulator is an important portion of FM/FM telemetering system.In practical engineering,the real timeand low complexity requirements are difficult to realize,because high data transmission quantity causes the delay of processing processand high hardware resource consumption. This paper proposes the performance optimization scheme of digital FM demodulator inpractical engineering.In the process of demodulation, the half-band filter is used to extract and filter the original data in order to reduceprocessing quantity of data and reduce the frequency of data input and realize high efficiency of computation.At last, the simulation isperformed with MATLAB for the proposed scheme,and the results prove its correctness and availability.